Turn signal electrical issue 1970 Mach 1
#1
Hi there. I've been troubleshooting an issue where the left turn signal stops working and is permanently lit in front left park and hood light  with no flashing. I've narrowed it down to the following issue but haven't figured out where to go next.


  1. Without the park lights on, both filaments in the front left park light are energized when turn signal is engaged and stray voltage is causing right park light to energize and flash albeit at a lower power level over the park wire. 

  2. With the park lights on, both filaments in the front left park light are energized along with the left hood lamp indicator but the turn signal is in the neutral position. Left turn signal does not work at TS switch.

  3. I confirmed that my park wire is energized and flickering voltage to the right park light when the left TS switch is activated. 

  4. Not yet sure if related but the low/high beam floor switch doesn't seem to be working and I have not yet chased those wires.
My take is somewhere from the TS switch forward voltage is leaking across the park and turn signal wires on the left side, just not entirely sure where that is yet. My next spot to check is the plug from the loom to the light by bypassing it completely, which the PO did on the other side. Anywhere else I should look to where the TS wires and park wires come in close contact?


Thanks
Reply
#2
Maybe some info in this thread  https://mach1club.com/showthread.php?tid=7907
Reply
#3
(10-21-2021, 07:11 PM)Oztrailer Wrote: Maybe some info in this thread  https://mach1club.com/showthread.php?tid=7907
Thanks for passing that along. My left side marker light doesn't work so I'm wondering if that is where the two lines are grounded/shorting. I didn't want to do it but I'm going to clip the wires to the side marker and front left park light to see if the issue stops. I'll know because my hood indicator light which is further up stream on the loom lights up solid when the park lights are on. That will at least let me know if those assemblies are the root cause.  

Cheers
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  smooth window operation on 70 Mach CUSTOMMISER 2 1,482 08-15-2022, 12:10 PM
Last Post: CUSTOMMISER
  Is your Mach 1 on Google Earth Street View? Rare Pony 2 1,891 03-05-2022, 07:30 AM
Last Post: Rare Pony
  72 Mach 1 Power Steering Pressure Hose Jelly 1 2,946 11-07-2021, 08:42 AM
Last Post: JTS71 Mach1
  Sequential tail light issue. 390mach1 6 4,710 05-23-2021, 10:28 AM
Last Post: JTS71 Mach1
  '03 Mach 1 fuel pump skidmarky 1 2,732 04-29-2021, 11:06 PM
Last Post: JTS71 Mach1
  Another issue come up ProblemChild54 2 6,095 03-11-2020, 12:01 AM
Last Post: Mister 4x4
  69 Mach 1 rear seat install RostaRob 8 18,651 06-29-2019, 02:44 AM
Last Post: rindel
  trouble with the hood mounted turn signal goldmach1 13 22,864 09-27-2018, 08:12 AM
Last Post: goldmach1
  How much of your Mach 1 have you replaced? Mister 4x4 8 18,323 07-13-2018, 08:45 AM
Last Post: Steven Harris
  1970 Mach 1 Hood tach rlincoln0814 15 30,104 03-08-2018, 03:53 AM
Last Post: 1969_Mach1

Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Latest Threads
What's One More Iron In The Fire!
Last Post: fram lee666
03-18-2024 06:21 PM
» Replies: 125
» Views: 238154
"Jacobra"
Last Post: JTS71 Mach1
06-30-2023 11:13 PM
» Replies: 86
» Views: 150936
My old Queensland Ambulance
Last Post: JTS71 Mach1
06-30-2023 11:08 PM
» Replies: 5
» Views: 1708
New member from San Jose, CA
Last Post: JTS71 Mach1
05-09-2023 08:39 AM
» Replies: 12
» Views: 3969
Saving Seatbelts
Last Post: Jim
02-19-2023 10:23 PM
» Replies: 2
» Views: 9115
Sourcing new wheels
Last Post: JTS71 Mach1
01-25-2023 02:34 PM
» Replies: 1
» Views: 2004
Shaker Air Filter
Last Post: JTS71 Mach1
01-08-2023 02:24 AM
» Replies: 3
» Views: 1468
1971 Mach 1 parting out interior parts -...
Last Post: ylwhrse
12-22-2022 01:38 PM
» Replies: 0
» Views: 641
Painting
Last Post: Rare Pony
12-14-2022 06:24 PM
» Replies: 2
» Views: 1971
WELCOME ALL NEW MEMBERS INTRODUCE YOURSE...
Last Post: JTS71 Mach1
08-31-2022 01:36 PM
» Replies: 82
» Views: 157089
1970 mach 1 matching numbers
Last Post: Kstweeter
08-31-2022 10:31 AM
» Replies: 1
» Views: 1087
Brake booster/servo hose length
Last Post: JTS71 Mach1
08-23-2022 09:40 AM
» Replies: 7
» Views: 3009
New Member
Last Post: JTS71 Mach1
08-20-2022 11:18 AM
» Replies: 2
» Views: 1501
smooth window operation on 70 Mach
Last Post: CUSTOMMISER
08-15-2022 12:10 PM
» Replies: 2
» Views: 1482
Blinkers on solid
Last Post: busted21
08-09-2022 03:58 AM
» Replies: 14
» Views: 8730
Blinkers on solid when lights on.
Last Post: JTS71 Mach1
08-08-2022 12:06 PM
» Replies: 1
» Views: 1722
351 cj running hot
Last Post: busted21
08-08-2022 12:13 AM
» Replies: 5
» Views: 3411
Major Winter projects
Last Post: JTS71 Mach1
07-09-2022 05:12 AM
» Replies: 49
» Views: 21305
Happy Fathers Day!!!
Last Post: JTS71 Mach1
06-20-2022 02:34 AM
» Replies: 0
» Views: 1686
1969 Raven Black 390 Looking For
Last Post: mason1958
06-11-2022 09:48 AM
» Replies: 10
» Views: 15091

>